def __init__(self): gr.top_block.__init__(self) usage = "%prog: [options] samples_file" parser = OptionParser(option_class=eng_option, usage=usage) parser.add_option("-m", "--dab-mode", type="int", default=1, help="DAB mode [default=%default]") parser.add_option("-F", "--filter-input", action="store_true", default=False, help="Enable FFT filter at input") parser.add_option("-s", "--resample-fixed", type="eng_float", default=1, help="resample by a fixed factor (fractional interpolation)") parser.add_option("-S", "--autocorrect-sample-rate", action="store_true", default=False, help="Estimate sample rate offset and resample (dynamic fractional interpolation)") parser.add_option('-u', '--usrp-source', action="store_true", default=False, help="Samples from USRP (-> adjust params for 2 MSPS)") parser.add_option('-d', '--debug', action="store_true", default=False, help="Write output to files") parser.add_option('-v', '--verbose', action="store_true", default=False, help="Print status messages") (options, args) = parser.parse_args () if options.usrp_source: dp = dab.dab_parameters(options.dab_mode, verbose=options.verbose, sample_rate=2000000) else: dp = dab.dab_parameters(options.dab_mode, verbose=options.verbose) rp = dab.receiver_parameters(options.dab_mode, softbits=True, input_fft_filter=options.filter_input, autocorrect_sample_rate=options.autocorrect_sample_rate, sample_rate_correction_factor=options.resample_fixed, correct_ffe=True, equalize_magnitude=True, verbose=options.verbose) if len(args)<1: print "error: need file with samples" sys.exit(1) else: filename = args[0] if options.verbose: print "--> using samples from file " + filename self.src = gr.file_source(gr.sizeof_gr_complex, filename, False) self.dab_demod = dab.ofdm_demod(dp, rp, verbose=options.verbose, debug=options.debug) self.fic_dec = dab.fic_decode(dp, verbose=options.verbose, debug=options.debug) self.connect(self.src, self.dab_demod, self.fic_dec) self.connect((self.dab_demod,1), (self.fic_dec,1))
def __init__(self, autocorrect_sample_rate=False, input_filter=True, ber_sink=False): gr.top_block.__init__(self) self.dp = dab.dab_parameters(1) self.rp = dab.receiver_parameters(1, softbits=False, input_fft_filter=input_filter, autocorrect_sample_rate=autocorrect_sample_rate, correct_ffe=True, equalize_magnitude=False) self.ber_sink = ber_sink os.environ['GR_SCHEDULER'] = "STS" # need single threaded scheduler for use with concatenate_signals